Well, this is now a thing. So i take it that its a brand new production company called 351Pro with Jupiter stopping by to say "Yo". I can live with that. Its world building without over-saturating 765Pro's idol count. (50 is enough!) However, it does bug me that its a card game AGAIN. I'm also not digging the character designs too much. Maybe I have to give it time, but none of these boys (besides Jupiter) really stuck out to me. Though judging by the group shot at the end of the trailer, we COULD be getting some trap idols ala Ryo, which are always welcome in my book.

Speaking of Ryo, not a single sign of him! Namco Bandai, PLEASE do something about this!

It looks like there's more of a focus on their lives before coming idols, like the famitsu article talked about "from a pilot/pro soccer player/part timer/etc. to an idol!" The designs are a little bland, but they're rather cute.

Translated a few of the descriptions, by the way. Looks like these three are the Yukiho/Chihaya/Yayoi or Miki/Haruka/Chihaya that you start with... Or so I thought, but Tsubasa is an Normal-type while the two others are Rare.

Teru Tendo: The red-haired one. From an attorney to an idol!~With hard work and guts, he's the hot-blooded lawyer hero!~"My name's Teru Tendo, and I'll become the idol world's brightest star!"

Kaoru Sakuraba: The one with black hair and glasses.From a surgeon to an idol!~Commencing the most supreme operation!~"There's no value in putting us in a team."

Tsubasa Kashiwagi: The one with brown hair and blue eyes.From a pilot to an idol!~A beautiful liftoff on stage!~"I... Want to stand there as well."

"An idol's job is to carry everybody's dreams. They're supposed to use song and dance to make people happy. When the famous idols I know appear on TV or do concerts... That alone makes the audiences watching them smile. THAT'S WHY I WANT TO BE AN IDOL TOO..." - Ai Hidaka, THE IDOLM@STER DEARLY STARS Splash Red

I'm guessing this is because that is how it is pronounced. The "u" in Touma extends the sound of the "o" in "To". Sometimes people use Toma (usually with a bar over the 'o') to be a romaji version of とうま (touma).